* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
input {
  background-color: transparent;
  border: solid 1px whitesmoke;
  line-height: 1.5em;
  color: whitesmoke;
}
a {
  color: whitesmoke;
}
/*水平翻转*/
body {
  background-color: #1e1e1e;
  color: white;
}
body h1 {
  text-align: center;
  line-height: 2em;
}
body main {
  width: 80%;
  margin: 0 auto;
}
body main a {
  display: block;
  margin: 5px;
  text-decoration: none;
  transition: all 0.2s;
}
body main a:hover {
  color: #9cdcfe;
}
